Antoine van der Lee Indie Developer & Founder of SwiftLee Developing iOS apps since 2009. Former Staff iOS Engineer at WeTransfer, Amsterdam Newsletter The best way to follow my work is by following my weekly newsletter. Read more or follow directly: Interviews Indie Watch Issue 9: RocketSim by Antoine van der Lee Aryaman Sharda asked …
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Shortcuts essentials in Xcode to speed up your workflow
Making use of essential shortcuts in Xcode can speed up development and keep you in your flow. Xcode allows you to customise a lot, but most of the shortcuts are easy to adopt by default without custom settings. Run without building Sometimes during development, it can be useful to run the same build again, without …
Measure the performance of code in Swift
It’s important in any type of programming language to know how to measure the performance of code as there are many different ways to write solutions and not every solution is as performant as the other. If a piece of code turns out to be slow in, for example, the results of the Time Profiler …
Performance, functional programming and collections in Swift
Functional programming is often done in Swift and so easy that it could easily hit performance. Iterating over large collections and performing actions like filter or map is common and should be used wisely. Performance is often decreasing when these methods are combined, like a filter followed by first. A list of best practices. Prefer …
SwiftLint valuable opt-in rules to improve your code
SwiftLint is a tool by Realm to enforce Swift style and conventions. It’s proven to be adopted by a lot of developer with over 10.000 stars on Github. 149 Rules are available for you to use from which a lot are enabled by default. In this post, we’re going over some valuable rules which are …
Updating to Swift 4.2
Swift 4.2 is a major release and shipped with Xcode 10. It comes with a lot of code improvements for which the best way to start is to watch the WWDC 2018: Whatโs New in Swift session. Some of the improvements are easy to implement in your existing code. Replace strongSelf with self SE-0079 makes …
Command-click on code options and possibilities in Xcode
Command-click no longer jumps to definition by default since Xcode 9 is introduced. It opens up a handy menu instead with a lot of options for quick editing, like: The old command-click behaviour can be restored in the settings or simply mimicked by using control + command + click Navigating through callers This option allows …
Effective development by improving the daily routine as a developer
Effective development can be achieved by learning more skills, but also by improving the daily routine for you as a developer. Creating consistency in your daily flow will bring efficiency and higher productivity. Close your mail app for example at 10 AM and see what it does. Do you really have to answer incoming emails …
Compiler Diagnostic Directives using a hashtag in Swift
The Swift standard library brings quite some compiler diagnostic directives by default. Although this might not ring a bell at all, a lot of them are quite known and listed in the Swift repository. Warning Warning can be used to manually trigger a warning on the given line. This can be useful during development to …
Where usage in Swift
Where is a powerful keyword within Swift to easily filter out values. It can be used in many different variants from which most of them are listed in this post. Usage in a switch Consider having the following enum: Using where you can easily filter the case for a specific age range: Usage in a …